Abstract
The Visualization technique using micro capsuled thermo-sensing liquid crystals (TLC) suspension method can be obtained to the information both temperature and velocity, simultaneously. It is, however, not so easy to apply its technique to the quantitative measurement. This paper presents a procedure to determine the instantaneous isothermal temperature distributions in a time-varying thermal flow field visualized by the TLC tracer particles. Liquid crystal video images photographed by a 3-CCD camera are digitized into three frames concerning the intensities of red, green and blue light. These three RGB images are filtrated by the weighted averaging method. By using Munsell color system. the relations between colors and temperatures are calibrated. This color image processing technique has been applied to the unsteady thermal flow field, and two dimensional isothermal temperature distributions were successfully measured.
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